Beastie Boys Co-Founder Adam Yauch Dead at 47

Adam Yauch, one-third of the pioneering hip-hop group the Beastie Boys, has died at the age of 47, Rolling Stone has learned. Yauch, also known as MCA, had been in treatment for cancer since 2009. The rapper was diagnosed in 2009 after discovering a tumor in his salivary gland.

"It is with great sadness that we confirm that musician, rapper, activist and director Adam 'MCA' Yauch, founding member of Beastie Boys and also of the Milarepa Foundation that produced the Tibetan Freedom Concert benefits, and film production and distribution company Oscilloscope Laboratories, passed away in his native New York City this morning after a near-three-year battle with cancer," reads an official statement from the Beastie Boys. "He was 47 years old."